EP0709871B1 - Klystron à cavités multiples - Google Patents

Klystron à cavités multiples Download PDF

Info

Publication number
EP0709871B1
EP0709871B1 EP95116590A EP95116590A EP0709871B1 EP 0709871 B1 EP0709871 B1 EP 0709871B1 EP 95116590 A EP95116590 A EP 95116590A EP 95116590 A EP95116590 A EP 95116590A EP 0709871 B1 EP0709871 B1 EP 0709871B1
Authority
EP
European Patent Office
Prior art keywords
resonant
cavity
tuning device
resonant cavity
klystron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95116590A
Other languages
German (de)
English (en)
Other versions
EP0709871A1 (fr
Inventor
Wako c/o NEC Corporation Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of EP0709871A1 publication Critical patent/EP0709871A1/fr
Application granted granted Critical
Publication of EP0709871B1 publication Critical patent/EP0709871B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/18—Resonators
    • H01J23/20—Cavity resonators; Adjustment or tuning thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2225/00—Transit-time tubes, e.g. Klystrons, travelling-wave tubes, magnetrons
    • H01J2225/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J2225/10—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator

Definitions

  • the present invention relates to a mechanism for varying the tuned frequencies of cavities of a multiplecavity klystron.
  • the multiplecavity klystron is a typical microwave electron-beam tube for amplifying microwaves with an electron beam for use in microwave satellite communications.
  • Another microwave electron-beam tube for amplifying microwaves is a traveling-wave tube.
  • the multiplecavity klystron and the traveling-wave tube differ from each other with respect to a RF circuit which causes an input signal wave and an electron beam to interact with each other.
  • the multiplecavity klystron comprises a plurality of interconnected resonant cavities for passing an electron beam therethrough.
  • the electron beam is speeded up and slowed down by a RF voltage developed in the resonant cavities for thereby amplifying the microwave.
  • the traveling-wave tube has its input and output ends interconnected at high frequencies, and amplifies a microwave by matching its phase speed to an electron beam that passes through the input and output ends.
  • the multiplecavity klystron is more durable and stable than the traveling-wave tube, but has a narrower band because it amplifies a microwave with the resonant cavities. Therefore, the multiplecavity klystron usually has a tuning device for varying the resonant frequencies in order to maintain the frequency range that is used.
  • the structure of a multiplecavity klystron will be described below with reference to Fig. 1 of the accompanying drawings.
  • the multiplecavity klystron comprises an electron gun 508 for generating and emitting an electron beam, a RF circuit 509 for causing high-frequency electric energy to interact with the electron beam, a collector 510 for catching the electron beam, and a focusing device 511 for focusing the electron beam.
  • the RF circuit 509 is composed of a plurality of resonant cavities, a tuning device associated with the resonant cavities for varying the respective inductances of the resonant cavities to vary resonant frequencies thereof, and a tuning mechanism 512 connected to and supporting the tuning device.
  • Figs. 2(A), 2(B) and 3(A), 3(B) of the accompanying drawings show resonant cavities, respectively, disclosed in Japanese laid-open utility model publications Nos. 2-18254 and 1-165551, respectively.
  • Figs. 2(A) and 3(A) are longitudinal cross-sectional views of the resonant cavities
  • Figs. 2(B) and 3(B) are transverse cross-sectional views of the resonant cavities.
  • the resonant cavities denoted at 601, 701, respectively, have respective cavity casings 602, 702, respective drift tubes 603, 703, respective tuning devices 604, 704, respective tuning device supports 605, 705, respective connecting rods 606, 706, and respective bellows 607, 707.
  • the operating frequency of the resonant cavities 601, 701 increases as the tuning devices 604, 704 are displaced closer to the drift tubes 603, 703, reducing the inductance.
  • the operating frequency of resonant cavities 601, 701 decreases as the tuning devices 604, 704 are displaced away from the drift tubes 603, 703.
  • other resonant cavities 601', 701' are defined by the respective tuning devices 604, 704, the respective tuning device supports 605, 705, the respective connecting rods 606, 706, and respective walls having holes through which the connecting rods 606, 706 extend.
  • the resonant cavities 601', 701' are positioned across the tuning devices 604, 704 from the resonant cavities 601, 701 which serve as main resonant cavities on the other side of the tuning devices 604, 704.
  • the distance from the tuning device 604 to the wall having the hole through which the connecting rod 606 extends is represented by L, the length of the tuning device support 605 in the axial direction of the drift tube 603 by C, the length of the tuning device support 605 in the direction perpendicular to the axis of the drift tube 603 by D, the length of the tuning device support 605 in the direction along the connecting rod 606 by E, the distance between upper and lower inner wall surfaces of the cavity casing 602 by A, the distance between left and right inner wall surfaces of the cavity casing 602 by B, and the diameter of the connecting rod 606 by R.
  • f te11N c x ⁇ [1/ ⁇ 2 + 1/(2 x L/N) 2 ] ⁇ 1/2
  • c the speed of light
  • N a natural number
  • ⁇ A + B + ⁇ x R/2 if the dimension E is sufficiently small
  • ⁇ A + B + C + D if the dimension E is sufficiently large.
  • the value of ⁇ varies between the above values depending on the dimension E.
  • f temN c x ⁇ [1/(2 x L/N) 2 ] ⁇ 1/2
  • c is the speed of light and N is a natural number.
  • the dimension L varies when the tuning device 604 is moved. As described above, the operating frequency of the main resonant cavity 601 increases as the tuning device 604 is displaced closer to the drift tube 603, reducing the inductance, and decreases as the tuning device 604 is displaced away from the drift tube 603.
  • the resonant frequencies f temN, f te11N of the other resonant cavity 601' decrease as the tuning device 604 is displaced closer to the drift tube 603, and increase as the tuning device 604 is displaced away from the drift tube 603.
  • Fig. 4 of the accompanying drawings is a diagram showing the relationship between the resonant frequencies of the main resonant cavities and the resonant frequencies of the other resonant cavities of the conventional arrangements shown in Figs. 2(A), 2(B) and 3(A), 3(B).
  • Fig. 5 of the accompanying drawings shows a structure combined with a tuning device for varying a capacitance as disclosed in Japanese laid-open patent publication No. 62-295336.
  • the illustrated structure includes a cavity casing 902, a drift tube 903, a tuning device (capacitive plate) 904, a connecting rod 906, and a bellows 907.
  • the publication reveals that the resonant frequency of the other resonant cavity, i.e., the space defined by the bellows 907 and the connecting rod 906, is made three times greater than the resonant frequency of the main resonant cavity.
  • ⁇ ⁇ ⁇ /2(R + P) the dimension L is smaller than 1/2 of the wavelength of a wave whose frequency is three times greater than the resonant frequency of the main resonant cavity.
  • Fig. 6 of the accompanying drawings is a diagram showing the relationship between the resonant frequency of the main resonant cavity and the resonant frequency of the other resonant cavity of the conventional arrangement shown in Fig. 5.
  • the operating frequency range of a multiplecavity klystron has increased and been shifted to higher frequencies.
  • the resonant frequency of the other resonant cavity which has not been taken into account in the conventional multiplecavity klystron using the tuning device for varying the reactance, may possibly coincide with the resonant frequency of the main resonant cavity in the operating frequency range, as shown in Fig. 7 of the accompanying drawings.
  • the operating frequency range has increased, it has been necessary to increase the dimension L shown in Fig. 2, and a resonant cavity of a higher frequency has been necessitated in order to achieve higher frequencies.
  • the resonant cavity may be reduced in size, because the connecting rod which supports the tuning device and the bellows for hermetically sealing the connecting rod cannot be reduced in size on account of strength requirements. Consequently, the dimensions A, B, C, D, E, R shown in Fig. 2 necessarily become large. If the resonant frequency of the other resonant cavity is lowered to agree with the resonant frequency of the main resonant cavity, then some electric characteristics of the resonant cavity are impaired.
  • the impaired electric characteristics of the resonant cavity primarily include an increased leakage of high-frequency electric energy into the other resonant cavity, resulting in a reduction in the high-frequency electric energy in the main resonant cavity, and a connection of the main resonant cavity to another main resonant cavity through the other resonant cavity.
  • the dimension L between the tuning device of the second resonant cavity and the wall may be selected to determine the frequencies.
  • the tuning device support has a length C in the axial direction of the drift tube, a length D in a direction perpendicular to the axis of the drift tube, and a length E in a direction along the connecting rod.
  • the lengths C, D, E may be selected to determine the frequencies.
  • the diameter R of the connecting rod may be selected to determine the frequencies.
  • the cavity casing has upper and lower inner wall surfaces spaced from each other by a distance A and left and right inner wall surfaces spaced from each other by a distance B.
  • the distance A or the distance B may be selected to determine the frequencies.
  • the value of ⁇ varies between the above values depending on the dimension E.
  • the other resonant cavity is defined by determining the dimension L to satisfy the relationship: f temN ⁇ f main ⁇ f tem(N+1), and thereafter determining the dimensions A, B, C, D, E, R so that the resonant frequency in the TE11 mode between f temN and f tem(N+1) satisfies the relationship: f main ⁇ f te11.
  • Figs. 8(A) and 8(B) show a multiplecavity klystron according to a first embodiment of the present invention.
  • the multiplecavity klystron according to the first embodiment of the present invention comprises a main resonant cavity 101, another resonant cavity 101', a cavity casing 102, a drift tube 103, a tuning device 104, a tuning device support 105, a connecting rod 106, and a bellows 107.
  • the distance A between upper and inner wall surfaces of the cavity casing 102, the distance B between left and right inner wall surfaces of the cavity casing 102, the length C of the tuning device support 105 in the axial direction of the drift tube 103, the length D of the tuning device support 105 in the direction perpendicular to the axis of the drift tube 103, the length E of the tuning device support 105 in the direction along the connecting rod 106, and the diameter R of the connecting rod 106 are determined to satisfy the following relationship: f te111 > f main. In this embodiment, the above dimensions are determined to reduce ⁇ .
  • the mode is TE111
  • an electric field is concentrated in the center of the dimension L.
  • the length E of the tuning device support 105 in the direction along the connecting rod 106 is set to 1/3 of the dimension L or less.
  • the dimensions A, B are required to accommodate the tuning device 104, the dimensions A, B are only slightly smaller than the dimensions of the cavity casing 102 which defines the main resonant cavity 101 therein.
  • the dimensions E, L are determined first, and the other dimensions are determined to satisfy the relationship: f te111 > f main depending on the diameter R of the connecting rod 106.
  • the diameter R is selected so as not to cause the connecting rod 106 to suffer strength problems.
  • Fig. 10 illustrates the relationship between the resonant frequencies of the main and other resonant cavities 101, 101' of the multiplecavity klystron according to the first embodiment of the present invention whose dimensions are determined in the manner described above.
  • Figs. 9(A) and 9(B) show a multiplecavity klystron according to a second embodiment of the present invention.
  • the multiplecavity klystron according to the second embodiment of the present invention comprises a main resonant cavity 201, another resonant cavity 201', a cavity casing 202, a drift tube 203, a tuning device 204, a tuning device support 205, a connecting rod 206, and a bellows 207.
  • the distance A between upper and inner wall surfaces of the cavity casing 202, the distance B between left and right inner wall surfaces of the cavity casing 202, the length C of the tuning device support 205 in the axial direction of the drift tube 203, the length D of the tuning device support 205 in the direction perpendicular to the axis of the drift tube 203, the length E of the tuning device support 205 in the direction along the connecting rod 206, and the diameter R of the connecting rod 206 are determined to satisfy the following relationship: f te111 > f main. In this embodiment, the above dimensions are determined to increase ⁇ .
  • the dimensions C, D are required to be fall in the main resonant cavity 201, these dimensions C, D are necessarily determined.
  • the dimensions E, L are determined at first, and the dimensions A, B are increased, increasing the value of ⁇ , thereby satisfying the relationship: f te111 > f main.
  • Fig. 11 illustrates the relationship between the resonant frequencies of the main and other resonant cavities 201, 201' of the multiplecavity klystron according to the second embodiment of the present invention whose dimensions are determined in the manner described above.
  • the multiplecavity klystron according to the second embodiment of the present invention is more advantageous than the multiplecavity klystron according to the first embodiment of the present invention in that it can easily be designed because of fewer dimensional limitations.
  • the multiplecavity klystron according to the present invention offers the following advantages:
  • the dimensions L, A, B, E, R can be determined to keep the operating frequency of a first resonant cavity (main resonant cavity) of a RF circuit of a multiplecavity klystron out of coincidence with the resonant frequency of a second resonant cavity (another resonant cavity) in the frequency range that is used, thereby preventing electric characteristics of the main resonant cavity from being impaired.
  • the multiplecavity klystron according to the present invention has a wide range of frequencies in which it can be used and is capable of operating at high frequencies.

Landscapes

  • Microwave Tubes (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Claims (1)

  1. Klystron à cavités multiples, comprenant :
    un boítier pour cavités (102) ;
    un dispositif d'accord (104) disposé dans ledit boítier pour cavités et destiné à faire varier une inductance d'une cavité résonnante associée ;
    un tube de regroupement (103) monté sur ledit boítier pour cavités (102) ;
    un support de dispositif d'accord (105) supportant ledit dispositif d'accord (104) ;
    une tige de connexion (106) ayant une extrémité connectée audit support de dispositif d'accord (105) et une extrémité opposée s'étendant à l'extérieur dudit boítier pour cavités (102), sans être au contact de celui-ci, à travers un orifice défini dans une paroi du boítier pour cavités (102) qui est positionnée de l'autre côté dudit dispositif d'accord (104) par rapport audit tube de regroupement (103) ; et
    un soufflet (107) connecté à une partie de ladite tige de connexion (106), à l'extérieur dudit boítier pour cavités (102) et de ladite paroi du boítier pour cavités, fermant ainsi hermétiquement ledit dispositif d'accord (104) ;
    ledit dispositif d'accord (104), ledit boítier pour cavités (102) et ledit tube de regroupement (103) formant, conjointement, un circuit haute fréquence comprenant une première cavité résonnante (101) ;
    ledit dispositif d'accord (104), ladite tige de connexion (106) et ladite paroi formant, conjointement, une seconde cavité résonnante (101') qui diffère de ladite première cavité résonnante (101),
    caractérisé en ce que
    les fréquences de résonnance dans les modes TEM et TE11 de ladite seconde cavité résonnante (101') diffèrent de la fréquence de fonctionnement de ladite première cavité résonnante (101) et ne coïncident pas avec la fréquence de fonctionnement de la gamme de fréquences de fonctionnement du klystron ; et en ce qu'au moins l'une desdites fréquences de résonnance de ladite seconde cavité résonnante est inférieure à la fréquence de fonctionnement de ladite première cavité (101) sur l'entière gamme de fréquences de fonctionnement du klystron.
EP95116590A 1994-10-31 1995-10-20 Klystron à cavités multiples Expired - Lifetime EP0709871B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP266879/94 1994-10-31
JP6266879A JP2713185B2 (ja) 1994-10-31 1994-10-31 多空胴クライストロン

Publications (2)

Publication Number Publication Date
EP0709871A1 EP0709871A1 (fr) 1996-05-01
EP0709871B1 true EP0709871B1 (fr) 1999-04-21

Family

ID=17436932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95116590A Expired - Lifetime EP0709871B1 (fr) 1994-10-31 1995-10-20 Klystron à cavités multiples

Country Status (4)

Country Link
US (1) US5691602A (fr)
EP (1) EP0709871B1 (fr)
JP (1) JP2713185B2 (fr)
DE (1) DE69509189T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101920463B1 (ko) 2016-07-14 2018-11-20 부산대학교 산학협력단 마이크로웨이브 공동공진기와 도파관 구조를 갖는 대면적 롤 필름 건조 장치

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002950326A0 (en) * 2002-07-24 2002-09-12 J I Peston Pty Ltd An electronic bait station
US8975816B2 (en) 2009-05-05 2015-03-10 Varian Medical Systems, Inc. Multiple output cavities in sheet beam klystron
CN102969551A (zh) * 2012-11-02 2013-03-13 广东通宇通讯股份有限公司 抽头电耦合结构及其通信射频器件

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01165551U (fr) * 1988-05-13 1989-11-20
JPH0218254U (fr) * 1988-07-19 1990-02-06

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614518A (en) * 1970-03-16 1971-10-19 Varian Associates Microwave tuner having sliding contactors
JPS54102943A (en) * 1978-01-31 1979-08-13 Nec Corp Resonance frequency variable cavity resonator
JPS61185841A (ja) * 1985-02-13 1986-08-19 Nec Corp 大電力クライストロン
JPS62295336A (ja) * 1986-06-12 1987-12-22 Nec Corp 大電力クライストロン
JPS6443546U (fr) * 1987-09-10 1989-03-15
JPH05266814A (ja) * 1992-03-23 1993-10-15 Nec Corp 多空胴形クライストロン
JPH0612993A (ja) * 1992-06-24 1994-01-21 Nec Corp 多空胴形クライストロン
JPH0636692A (ja) * 1992-07-17 1994-02-10 Nec Corp 多空胴形クライストロン

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01165551U (fr) * 1988-05-13 1989-11-20
JPH0218254U (fr) * 1988-07-19 1990-02-06

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101920463B1 (ko) 2016-07-14 2018-11-20 부산대학교 산학협력단 마이크로웨이브 공동공진기와 도파관 구조를 갖는 대면적 롤 필름 건조 장치

Also Published As

Publication number Publication date
US5691602A (en) 1997-11-25
DE69509189T2 (de) 1999-11-18
JP2713185B2 (ja) 1998-02-16
DE69509189D1 (de) 1999-05-27
JPH08129960A (ja) 1996-05-21
EP0709871A1 (fr) 1996-05-01

Similar Documents

Publication Publication Date Title
US5786740A (en) Dielectric resonator capable of varying resonant frequency
US3207943A (en) High frequency tube method and apparatus
US4588965A (en) Coaxial magnetron using the TE111 mode
EP0709871B1 (fr) Klystron à cavités multiples
US5477107A (en) Linear-beam cavity circuits with non-resonant RF loss slabs
US3684913A (en) Coupled cavity slow wave circuit for microwave tubes
US3448331A (en) Composite coaxial coupling device and coaxial window
US5315210A (en) Klystron resonant cavity operating in TM01X mode, where X is greater than zero
US3479556A (en) Reverse magnetron having an output circuit employing mode absorbers in the internal cavity
US4737738A (en) Extended interaction device tuned by movable delay line structure
US5537002A (en) Frequency tunable magnetron including at least one movable backwall
US3594605A (en) Mode suppression means for a clover-leaf slow wave circuit
US3230413A (en) Coaxial cavity slow wave structure with negative mutual inductive coupling
US4531103A (en) Multidiameter cavity for reduced mode competition in gyrotron oscillator
US4053810A (en) Lossless traveling wave booster tube
US5604402A (en) Harmonic gyro traveling wave tube having a multipole field exciting circuit
US3093804A (en) Tunable cavity resonator
US2947908A (en) Output structure for electron discharge devices employing cavity resonators
US3278795A (en) Multiple-beam klystron apparatus with waveguide periodically loaded with resonant elements
RU2749453C1 (ru) Широкополосный клистрон
US3418522A (en) Mode control for theta mode magnetrons
US3509412A (en) Multicavity klystron for microwave and uhf with interfering mode suppression slots in the ends of the drift tube
RU2194330C1 (ru) Телевизионный клистрон
JPH0232731B2 (fr)
US2904719A (en) Electron discharge devices and electrical resonators therefor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19960221

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 19961219

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 69509189

Country of ref document: DE

Date of ref document: 19990527

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20100715 AND 20100721

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20141014

Year of fee payment: 20

Ref country code: FR

Payment date: 20141008

Year of fee payment: 20

Ref country code: GB

Payment date: 20141015

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 69509189

Country of ref document: DE

Representative=s name: GLAWE DELFS MOLL PARTNERSCHAFT MBB VON PATENT-, DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 69509189

Country of ref document: DE

Owner name: NEC NETWORK AND SENSOR SYSTEMS, LTD., FUCHU-SH, JP

Free format text: FORMER OWNER: NETCOMSEC CO., LTD., TOKYO, JP

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20150611 AND 20150617

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Owner name: NEC NETWORK AND SENSOR SYSTEMS, LTD., JP

Effective date: 20150908

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69509189

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20151019

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20151019